The research, by the economist Helene Couprie, is based on a sample of more than 12, 000 men and women in the British Household Panel Survey.

这项由经济学家海琳·考普里所做的调查主要基于“英国家庭专门调查”的1万2千多名男性和女性。

youdao

As the sampling survey is stratified sampling, so the research of the sample rotation is under the stratified sampling.

由于该抽样调查采取的是分层抽样，因此相应地用分层抽样下的样本轮换研究。

youdao

This paper made empirical research on the relationship between the labor migration and urban unemployment in China according to the sample survey data of 1% population in 2005.

本文通过2005年1%人口抽样调查数据对我国劳动力流动与城市失业之间的关系进行了经验研究。

youdao

Among the most scientific and serious polls was the large-sample survey (844 respondents) by the Pew Research Center from Jan. 30 through Feb. 2.

CNN: By Ronald D. Elving, CQ Staff Writer

The survey was done by an outfit called Braun Research that polled a nationally representative sample of 1, 000 working Americans age 18 or older.

FORBES: How To Make Thousands Of Extra Dollars While at Work -- If You Can Bear It